3971820970 has 32 divisors (see below), whose sum is σ = 7814153088. Its totient is φ = 1444627008.

The previous prime is 3971820943. The next prime is 3971820973. The reversal of 3971820970 is 790281793.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 3971820970.

It is not an unprimeable number, because it can be changed into a prime (3971820973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219294 + ... + 236713.

It is an arithmetic number, because the mean of its divisors is an integer number (244192284).

Almost surely, 2^3971820970 is an apocalyptic number.

3971820970 is a deficient number, since it is larger than the sum of its proper divisors (3842332118).

3971820970 is a wasteful number, since it uses less digits than its factorization.

3971820970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456094.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 3971820970 is about 63022.3846740188. The cubic root of 3971820970 is about 1583.6646456696.

The spelling of 3971820970 in words is "three billion, nine hundred seventy-one million, eight hundred twenty thousand, nine hundred seventy".